Re: preempt-rt, NUMA and strange latency traces

Sébastien Dugué
2006-02-09T11:21:28Z

On Thu, 2006-02-09 at 01:04 -0500, Lee Revell wrote:
> On Wed, 2006-02-08 at 11:45 +0100, Sébastien Dugué wrote:
> > The more I think about it, the more I tend to believe it's hardware
> > related. It seems as if the CPU just hangs for ~27 ms before
> > resuming processing.
>
> That would be an exceptionally long latency - you would probably notice
> it if the mouse froze, VOIP dropped out, ping stops, etc for 30ms.
>

It's a test machine and I use it remotely with console redirected so
no mouse, no RT applications aside from my silly nanosleep() loop. But
I do notice that that test sometimes takes more time (ie when I get
those weird latencies).

Sébastien.